Lasting machine



Sept. 10, 1957 H. SCHWABE LASTING MACHINE 3 Sheets-Sheet 1 Filed July28, 1955 Pll Fig. l

INVENTOR.

Sept. 10, 1957 v H. SCHWABE 2,805,431

LASTING MACHINE Filed July 28, 1955 3 Sheets-Sheet 2 IN V EN TOR.

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UnitedStates Patent 2,805,431 LASTING MACHINE Herman Schwabe, New York,N. Y.

Application July 28, 1955, Serial No. 524,875 12 Claims. (Cl. 12-83)This invention comprises a new and improved lasting machine capable ofgeneral application and particularly useful for lasting or wrapping aflexible cover about the marginal edge of a platform sole or midsole.

An Object of the invention is to provide a machine of compact andetficient construction, convenient for the operator in its action on theshoe and with provision for adjustment of its operatinginstrumentalities so that materials of different character may behandled to the best advantage.

With this object in view an important feature of the machine consists ina novel cooperative working combination of instrumentalities whichinclude feed rolls rotatable about vertical axes, a guide roll partlyunderlyingone of the feed rolls, a heated wiper disk arranged to acton'the lasting margin as it leaves the feed rolls and preferably also asecond gage roll partially underlying the wiper disk.

The feed rolls are pressed yieldingly toward each other into engagementwith the lasting margin and rotate continuously in the lastingoperation. They are mounted to permit relative adjustment in thedirection of feed and thereby to locate the rolls in the most effectiverelation to each other and to the wiper disk. In the preferredconstruction one of the feed rolls is mounted in an antiliary bracketconnected to the machine frame by a pivot shaft having an eccentricportion, thus providing for the desired adjustment.

Since the machine is intended for use in connection with upper materialsof considerable variation in their characteristics and withcorrespondingly difierent adhesives, another feature of the inventioncomprises a heated wiper disk effective in its operation either to causerapid setting of the adhesive or to convert it to tacky condition as thecase may be. In its preferred construction the wiper is provided with acylindrical hub arranged to fit into a semi-cylindrical recess providedfor that purpose in an electrically heated unit. Heat is thustransferred effectively to the area of contact in the'wiper disk withthe work.

Other features of the invention comprise a novel arrangement of gaugerolls for insuring the proper presentation of the work to the operatinginstrumentalities of the machine and constructional features 'by whichthe feed rolls are subjected to yielding pressure in all positions ofadjustment and the wiper disk is maintained in yielding rotaryengagement with the over-wiped lasting margin.

These and other features of the invention will be best understood andappreciated from the following description of a preferred embodimentthereof selected for purposes of illustration and shown in theaccompanying drawings in which:

Fig. 1 is a view of the machine in front elevation,

Fig. 2 is a corresponding view in side elevation,

Fig. 3 is a plan view on the line 3-3 of Fig. 1,

Fig. 4 is a fragmentary view in perspective of the wiper disk and heatershown in exploded relation, and a Fig. 5 is a fragmentary view of partsshown in Fig. 1.

The operative instrumentalities of the machine comprise a pair ofknurled rolls, and 11 arranged to engage yieldingly and feed the lastingmargin of the work,

' gauge roll 12 partially underlying the rear or an edge ice innerknurled roll 10 of the pair, a heated wiper disk 13 which engages thelasting margin as it passes beyond the rolls 1i) and 11 and lays itprogressively over the insole or other element of the shoe bottom, andan auxiliary edge gauge roll 15. These elements are shownin operativerelation in Fig. 3, the outer knurled roll 11 being yieldingly urgedtoward the inner knurled roll 10 and the wiper disk 13 being mounted topermit limited heightwise yielding under spring pressure.

The organization of these elements in the machine frame will now bedescribed. The main frame 20 is shaped to provide suitable bearings andpoints of support for the moving parts of the machine and includes anattaching flange 21 by which the frame may be bolted to thecorresponding vertical face of a column which supports the machine atconvenient height for presentation of work by the operator. Bolted tothe frame and forming a part thereof is a hollow casing 22. The frame 20projects horizontally from its flange 21 and overhangs the operatinginstrumentalities of the machine.

Journaled in the frame 20 is a horizontal shaft 23 having a pulley 24 atits rear end and carrying at its forward end a helical gear 25. Thismeshes with a gear 26 fast to the upper end of a vertical shaft 27journaled I in a boss 28 formed integrally with the frame and extendingdownwardly from the body thereof. At its lower end the shaft 27 carriesa gear 29 and the rearmost knurled roll 10 which, it will be seen, isdriven about a fixed vertical axis by rotation of the pulley 24 throughthe connections just described.

The gear 29 on the shaft 27 is arranged to mesh with a spur gear 36 fastupon a vertical shaft 31 rotatably mounted in a bracket 32 pivotallysupported upon the frame of the machine by a vertical pivot shaft 33,best shown in Fig. 5. This mounting permits the bracket to swingoutwardly at its right side as seen in Fig. l, carrying with it thefront knurled roll 11 and thus permitting the two rolls to be separatedfor the introduction of the work. The bracket 32 is perforated for thefree passage of a fixed bolt 34 carrying a nut and disk at its outer endbetween which and the bracket 32 is interposed a stiff compressionspring 35. The bracket has an outwardly extended boss 36 at its freeside in which is formed a socket for a horizontal rod 37 having aspherical head. At its rear end the rod 37 is similarly connected to abell crank lever 38 pivotally'mounted on the rear portion of the frame20 and connected to a treadle rod 39. It will be apparent that bydeperssing this treadle rod the bracket 32 may be temporarily rockedoutwardly, separating the knurled rolls 10 and 11 and the meshing gears29 and 39 by which the outer roll is driven. When the treadle rod isreleased the spring 35 immediately restores the bracket 32 to itsoperative position, meshing the gear 30 with the driving gear 29 andholding the knurled roll 11 yieldingly against the work interposedbetween it and the roll 10.

The wiper disk 13 is secured to the lower end of a vertical shaft 40journaled in the frame 20 and passing upwardly through a boss 41 formedas an integral part of the frame. Above the boss 41 the shaft 40 carriesa pulley 42 by which it is driven through a belt from any suitablesource of power. In the upper end of the shaft 40 is formed a socket fora ball 43 which constitutes a thrust bearing and it is presseddownwardly by a flanged rod 44 mounted in the casing 22 and surroundedby a compression spring 45.

The wiper disk 13 is provided upon its lower face with a series ofstraight radial ribs 14 shown in dotted lines in Fig. 3. Above the diskit is provided with a cylindrical hub 50 and above that a circularflange 51. The hub 50 is designed to fit and rotate within asemi-circular re cess formed in the heater 16. The heater is formed in-I tegrally with a rectangular body 52 recessed to receive a heating unit53. The body of the heater is secured to a shelf 49 formed as anintegral part of the frame through the medium of a land 48 whichprojectsslightly above the body 52 and so provides an insulating space betweenit and the shelf 49. The circular flange 51 of the wiper overlies theheater 1 6 and the wiperdisk underlies it so that highly effective heattransfer is insured from the heater to the wiper disk.

The edge gauge roll 12 is rotatably mounted in the forward end of an arm54 adjustably secured to an angular bracket 55 fast to the boss 28 ofthe frame. Similarly the edge gauge roll is rotatably mounted in theforward end of an arm 56 also adjustably mounted on the bracket 55. a

I The shaft 31 is mounted in ball bearings (not shown) in the bracket 32and the outer knurled roll 11 is fast upon .its outer end. In order toadjust the relative position of the two rolls 10 and 11 the pivotshaft33 of the bracket 32 is provided with an eccentric body portion and endbearings which are rotatable in fixed portions of the frame. The head atthe lower end 'of the shaft 33 is journaled in the shelf portion 49 ofthe frame and has a screw driver slot by which it can be turned, theheater body 52 being temporarily removed for that purpose. A set screwis provided for holding the shaft in the selected position ofadjustment.

It will be apparent that by the means above described the roll 11 may beshifted toward the left or right from its position shown in Fig. ,3 orforwardly or rearwardly with respect to the direction of feed. Thus theaction of the rolls may be regulated to secure the best results indealing with upper stock of various characteristics. The range ofpermitted adjustment is not sufiicient to interfere with the meshing ofthe gears 29 and 30 and of course the aperture in the bracket for thebolt 34 is sufiicient for clearance in all positions of bracketadjustment. The compression spring 35 is therefore effective throughoutthe full range of adjustment.

The operation of the machine will be apparent from the foregoingdescription but may be summarized as follows. The feed rolls 10 and 11having been first adjusted for the upper stock in hand the machine isset in operation and the two rolls driven from the pulley 24 through theconnection above described. They are pressed yieldingly together by theaction of the spring 35 and rotate at substantially the same linearspeed, the gear 29 being slightly larger-than the gear 30 and the feedroll 11 being somewhat smaller in diameter than the feed roll 10. Thelasting margin is gripped between these two rolls as shown in Fig. 3 andadvanced in substantial vertical position. Meanwhile the edge of theupper is pressed against the gauge roll 12 which thus governs the in andout position of the Work. Meanwhile the wiper disk 13 has been heatedand is now driven independently through the pulley 42 engaging thelasting margin as it leaves the rolls 10 and 11 and over-wiping it incaterpillar fashion upon the insole or other part of the shoe bottom. Asalready explained the wiper disk is in effect backed up by the spring 45so that the over-wiped margin is subjected to the yielding action of theribs 14 of the .wiper disk. The over-wiped margin is at the same timeheated by the hot wiper disk and the adhesive action of the cementapplied thereto onto the shoe bottom is expedited. 7

Having thus disclosed my invention what I claim as new and desire tosecure by Letters Patent is:

1. A lasting machine comprising inner and outer driven feed rolls foradvancing the lasting margin, an edge gauge roll underlying the innerfeed roll, aheated wiper disk partially underlying the said inner feedroll in position to engagethe lasting margin as it leaves the feedrolls, and a second .edge gauge roll partially underlying the Wiperdisk.

2. A lasting machine comprising inner and outer driven feed rolls foradvancing the lasting margin of the work, means for urging the rollstoward each other, means for adjusting one roll with respect to theother in the direction of work feed, and a wiper for laying over themargin as it leaves the feed rolls.

3. A lasting machine comprising 'a frame having a vertical shaftjournaled therein with a feed roll at its lower end, a bracket mountedon the frame by a vertical pivot shaft having an eccentric portion, asecond Vertical shaft journaled in said bracket and bodily adjustabletherewith and a second feed'roll mounted at its lower end.

4. A lasting machine as describedin claim 3 in which the bracket isapertured and a shaft projects from the frame with clearance through theaperture and carries a compression spring engaged with the bracket.

5. A lasting machine as described in claim 3 in which the vertical shaftin the frame and the vertical shaft in the bracket are provided withmeshing gears.

6. A lasting machine of the class described having a pair of feedrollsrotatable about substantially vertical.

axes, in combination with a heated wiper disk rotatable about a verticalaxis in a plane below the level of the feed rolls.

7. A lasting machine as described in claim 6 in which the wiper disk isprovided on its lower face with radial straight ribs.

8. A lasting machine of the class described having a pair of feed rollsrotatable about substantially vertical axes, in combination with aheated wiper disk rotatable about a vertical axis in a plane below thelevel of the feed rolls, the wiper having a cylindrical hub with aconcentric circular flange at its upper end, and a heater having acylindrical recess fitting the rotary hub of the wiper and faces engagedrespectively by the disk and the flange of the wiper.

9. In a lasting machine a pair of cooperating feed rolls rotatable aboutvertical'axes for advancing the lasting margin of the work, incombination with a wiper rotatable about a vertical axis adjacent thefeed rolls, the wiper having a disk underlying one of said feed rollsand a hub of reduced diameter providing clearance for said feed roll,and a heater recessed to receive a portion of the hub.

'10. A lasting machine of the class described comprising a pair of feedrolls yieldingly pressed together and rotatable about substantiallyvertical axes with their bottom faces at the same level, a wiper diskrotatable beneath and substantially in contact with the bottom face ofone feed roll, and a pair of independently adjustable edge gaugeslocated in operative relationto the feed rolls and wiper.

l1. In a lasting machine of the class described, an overhanging framecarrying the operative instrumentalities of the machine which comprise apair of feed rolls rotatable about substantially vertical axes, incombination with a wiper disk rotatable abouta vertical axis in aplanebelow the level of the feed rolls, a vertical wiper shaft journaledin the overhanging frame and carrying the wiper disk at its lower end,and a separate springloaded rod arranged to bear continuously upon theupper end of the Wiper shaft.

12. A lasting machine as described in claim 11 in which the frame hasbearings for the wiper shaft and supports

